Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 92, NWS Detroit, MI

August 28, 2021Sanilac County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Aug 28, 2021, 7:11 PM EDT for Sanilac County, Michigan. It was in force for 64 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 28, 2021, 7:11 PM EDT (23:11 UTC)
Expired: Aug 28, 2021, 8:15 PM EDT
In force: 64 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Sanilac County, MI

The radar

The Detroit radar (KDTX), 113 km from the middle of the area, began a volume at 23:11 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 11.2 hours before the alert went out and 110 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1891 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 860 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

292 
WUUS53 KDTX 282311
SVRDTX
MIC151-290015-
/O.NEW.KDTX.SV.W.0092.210828T2311Z-210829T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
711 PM EDT Sat Aug 28 2021

The National Weather Service in Detroit/Pontiac has issued a

* Severe Thunderstorm Warning for...
  Northern Sanilac County in southeastern Michigan...

* Until 815 PM EDT.

* At 709 PM EDT, a severe thunderstorm was located near Deckerville,
  moving east at 20 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Deckerville around 715 PM EDT.
  Forestville around 740 PM EDT.

Other locations impacted by this severe thunderstorm include Tyre,
Palms, McGregor, Forester, Minden, Richmondville and New Greenleaf.

Additional strong to severe thunderstorms will also move into the 
area over the next half hour or so bringing additional gusty wind 
potential.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4348 8311 4367 8312 4368 8311 4369 8261
      4371 8261 4371 8258 4345 8253
TIME...MOT...LOC 2309Z 257DEG 18KT 4357 8281 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

DG

2 follow-up statements

109 
WWUS53 KDTX 282350
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
750 PM EDT Sat Aug 28 2021

MIC151-290015-
/O.CON.KDTX.SV.W.0092.000000T0000Z-210829T0015Z/
Sanilac MI-
750 PM EDT Sat Aug 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR NORTHERN SANILAC COUNTY...

At 750 PM EDT, severe thunderstorms were located along a line
extending from 7 miles east of Gagetown to near Cass City to near
Kingston, moving east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

These severe storms will be near...
  Argyle around 800 PM EDT.
  Deckerville around 815 PM EDT.
  Forestville around 830 PM EDT.

Other locations impacted by these severe thunderstorms include Tyre,
Palms, McGregor, Forester, Minden, Richmondville and New Greenleaf.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4348 8311 4367 8312 4368 8311 4369 8261
      4371 8261 4371 8258 4345 8253
TIME...MOT...LOC 2350Z 270DEG 31KT 4368 8310 4357 8308 4347 8314 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

DG

099 
WWUS53 KDTX 290013
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
813 PM EDT Sat Aug 28 2021

MIC151-290023-
/O.EXP.KDTX.SV.W.0092.000000T0000Z-210829T0015Z/
Sanilac MI-
813 PM EDT Sat Aug 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN SANILAC COUNTY WILL
EXPIRE AT 815 PM EDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with these thunderstorms.

LAT...LON 4348 8311 4367 8312 4368 8311 4369 8261
      4371 8261 4371 8258 4345 8253
TIME...MOT...LOC 0013Z 257DEG 18KT 4370 8295 4359 8293 4349 8299 

$$

DG

The office that day

Everything else NWS Detroit, MI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 28, 3:42 AM EDT	Heat Advisory	DTX	Genesee, Lapeer, Lenawee, Livingston, Macomb, Monroe and 5 more	16 hr
Aug 28, 4:25 AM EDT	Special Weather Statement	DTX	Bay, Midland	65 min
Aug 28, 3:45 PM EDT	Special Weather Statement	DTX	Saint Clair	60 min
Aug 28, 5:06 PM EDT	Special Weather Statement	DTX	Bay, Midland	84 min
Aug 28, 5:26 PM EDT	Special Marine Warning	DTX		94 min
Aug 28, 5:46 PM EDT	Special Weather Statement	DTX	Saginaw	74 min
Aug 28, 5:52 PM EDT	Severe Thunderstorm Warning	DTX	Saginaw	68 min
Aug 28, 6:16 PM EDT	Severe Thunderstorm Warning	DTX	Huron	59 min
Aug 28, 6:19 PM EDT	Special Marine Warning	DTX		86 min
Aug 28, 6:22 PM EDT	Severe Thunderstorm Warning	DTX	Bay	38 min
Aug 28, 6:43 PM EDT	Special Weather Statement	DTX	Tuscola	62 min
Aug 28, 6:51 PM EDT	Severe Thunderstorm Warning	DTX	Huron, Tuscola	54 min
Aug 28, 6:59 PM EDT	Special Marine Warning	DTX		31 min
Aug 28, 7:02 PM EDT	Severe Thunderstorm Warning	DTX	Saginaw	58 min
Aug 28, 7:07 PM EDT	Areal Flood Advisory	DTX	Saginaw	3 hr
Aug 28, 7:41 PM EDT	Special Weather Statement	DTX	Genesee, Lapeer, Shiawassee	79 min
Aug 28, 7:59 PM EDT	Special Marine Warning	DTX		91 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2021 Every severe thunderstorm warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.